<template>
	<!-- 搜索框区域 -->
	<view class="search-box">
		<uni-search-bar placeholder="搜索" cancelButton="none" @input="inputHandler" :focus="true"></uni-search-bar>
	</view>

	<!-- 搜索建议区域 -->
	<view class="sugg-list" v-show="keyword">
		<view class="sugg-item" v-for="(item,index) in searchResults" :key="index" @click="gotoDetail(item.goods_id)">
			<view class="goods-name">{{item.goods_name}}</view>
			<uni-icons type="arrowright" size="16"></uni-icons>
		</view>
	</view>

	<!-- 搜索历史 -->
	<view class="history-box" v-show="!keyword">
		<!-- 标题区域 -->
		<view class="history-title">
			<text>搜索历史</text>
			<uni-icons type="trash" size="17" @click="removeHistory"></uni-icons>
		</view>
		<!-- 列表区域 -->
		<view class="history-list">
			<uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		</view>
	</view>

</template>

<script>
	import {
		computed
	} from 'vue';
	export default {
		data() {
			return {
				searchText: '',
				timer: null,
				keyword: '',
				searchResults: [],
				historyList: []
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('searchKeyword') || '[]')
			//console.log(uni.getStorageSync('searchKeyword'))
		},
		methods: {
			//搜索框输入事件
			inputHandler(e) {
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					this.keyword = e
					//console.log(e)
					this.getSearchList()
				}, 500)
			},
			//获取搜索数据
			async getSearchList() {
				if (this.keyword.length === 0) {
					this.searchResults = []
					return false
				}

				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.keyword
				})
				if (res.meta.status !== 200) {
					uni.$showMsg()
				}
				this.searchResults = res.message

				this.saveSearchHistory()
			},
			//点击搜索建议跳转到商品详情页面
			gotoDetail(goods_id) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
				})
			},
			//保存搜索历史关键词
			saveSearchHistory() {
				// this.historyList.push()
				this.historyList.unshift(this.keyword)

				//将搜索记录持久化存储到本地
				uni.setStorageSync('searchKeyword', JSON.stringify(this.historyList))
			},
			//清空搜索历史
			removeHistory() {
				this.historyList = []
				uni.removeStorageSync('searchKeyword')
			},
			//点击搜索历史跳转商品列表页面
			gotoGoodsList(keyword) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + keyword
				})
			}
		},
		computed: {
			histories() {
				return [...new Set(this.historyList)]
			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
		background-color: #007AFF;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;

			.goods-name {
				// 文字不允许换行（单行文本）
				white-space: nowrap;
				// 溢出部分隐藏
				overflow: hidden;
				// 文本溢出后，使用 ... 代替
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			align-items: center;
			height: 40px;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>